Power threading tool



July 2, 1963 I c. H. INGWER 3,095,772

POWER THREADING TOOL Original Filed March 14, 1951 8 Sheets-Sheet 1INVENTORS' CARL H INGWER CLYDE E. WRIGHT HERMAN WE/B L T 5/1? ATTUPNEVJuly 2, 1963- c. H. INGWER 3, ,77

POWER THREADING TOOL Original Filed March 14, 1951 8 Sheets-Sheet 2INVENTORS CARL H. INGWEI? CLYDE E WRIGHT HERMAN WE lBEL B) V Z, 41 77/n2 ATTORNEY July 2, 1963 c. H. INGWER POWER THREADING TOOL.

8 Sheets-Sheet 3 Original Filed March 14, 1951 INVENTORS CARL h.l/VGWEI? CLYDE E. WRIGHT HERMAN WE/BEL B) M W HE? A T7'0RNE Y July 2,1963 c. H. INGWER 3,095,772 POWER THREADING TOOL Original Filed March14, 1951 8 Sheets-Sheet 4 FIG. 6

INVENTORS CARL H IIVGWER CLYDE E. WRIGHT HERMAN WE/BE L By (A THZ?ATTORNEY July 2, 1963 c, [NGWER 3,095,772

POWER THREADING TOOL Original Filed March 14, 1951 8 Sheets-Sheet 5INVENTORS CARL h. //V6WE/? CLYDE E. WRIGHT HERMAN WE/BEL 7 ..p

July 2, 1963 c. H. INGWER POWER THREADING TOOL 8 Sheets-Sheet 6 OriginalFiled March 14, 1951 ,JNVENTORS CARL /n/swm 00 05 E. WRIGHT HERMANWE/BEL B) X U W THE/R ATTORNEY July 2, 1963 c. H. INGWER 3,0 5,7 2

POWER THREADING TOOL Original Filed March 14, 1951 8 Sheets-Sheet 7 REmw H m m CLYDE E. WR/GHT HERMAN WE/BEL BY (AX/{AW v /JWN THE/R ATTORNEYJuly 2, 1963 c. H. INGWER "3.09577 POWER THREADING TOOL Original FiledMarch 14, 1951 s Sheets-Sheet 8 I\ E \Q Q N a N N O INVENTORS TH n? Arrok-NE Y United States Patent 1956. This application Aug. 16, 1960,Ser. No. 53,572 2 Claims. (Cl. 82-100) This invention relates to pipeworking tools, and more particularly to a pipe working tool having apower driven chuck and a cutting oil pumping system and a carriagehaving various tools mounted thereon.

This application is a continuation of our application Serial No.568,730, filed March 1, 1956, now abandoned, which was a division of ourco-pending application Serial No. 215,412, filed March 14, 1951, nowU.S. Patent No. 2,768,550, of October 30, 1956.

The rapid increase in the use of power driven pipe working tools hasbeen accompanied by many improvements in that class of tools. However,many problems remained unsolved. The present invention, by theconstruction used, eliminates several of the previous difliculties.

Prior devices for the power driving of pipe for threading and cuttinghave usually consisted of a power driven chuck having a stop means inthe form of a hook or fork to prevent a customary type hand operatedpipe tool from rotating as the pipe was turned relative to the tool.

More recently the complete power driven tool has appeared in which thepipe is driven by a chuck similar to the one formerly used separately.The pipe cutters, threaders, reamers, etc., are then mounted on asliding carriage which in turn is mounted on ways so that it can bemoved toward or away from the chuck. These devices have had poorlyarranged carriages. We have discovered a considerably more eflicientarrangement. In addition, by means of a novel free floating mounting ofthe pipe cutter, the machine of our invention is enabled to cut pipewhich is out-of-round or slightly bent. This has not been possibleheretofore because of the rigid mounting of the cutter. Moreover, theprior machines have had clumsy, inconvenient means, or no means at all,for handling the supply of cutting oil to the work piece being operatedon. By the construction of the new machine of our invention, the oil istransmitted through the supporting ways of the carriage to the carriageand through passageways in the carriage to a nozzle which applied theoil directly to the workpiece.

A more complete understanding of the invention may be had by referringto the following specification and figures in which:

FIG. 1 is a perspective view of a pipe working machine embodying theinvention;

FIG. 1a is a fragmentary perspective view of the cutter mounting boss;

FIG. 2 is a detailed side elevational view of the machine;

FIG. 3 is an end elevational view from one end of the carriage;

FIG. 4 is an end elevational view of the carriage from the end opposite:FIG. 3;

FIG. 5 is a detailed partial sectional view through the valve of the oilsystem drawn to an enlarged scale;

FIG. 6 is a detailed partial sectional view from line 6-6 of FIG. 3drawn to an enlarged scale;

FIG. 7 is a sectional view along line 7-7 of FIG. 6;

FIG. 7A is a partial top plan view with a part broken away;

FIG. 8 is a view similar to FIG. 1, of a second embodiment of ourinvention;

FIG. 9 is an elevational view of a novel reamer used in the embodimentof FIG. 8;

FIG. 10 is a sectional view along line 10-10 of FIG. 9;

FIG. 11 is a sectional view along line 11-11 of FIG. 9;

FIG. 12 is a sectional view along line 12-12 of FIG. 9;

FIG. 13 is a sectional view along line 13-13 of FIG. 9, with the reamerfully retracted; and

FIG. 14 is a view similar to FIG. 13 with the reamer in its alternateposition, fully extended.

Briefly, the invention consists of a power drive machine primarilydesigned for cutting, threading and otherwise working pipe, although itmay also be used to cut and thread bolts or the like. The machineconsists of a frame work including legs and a bed which supports a powerdriven chuck. Extending from the housing of the chuck are a pair ofsupporting ways. A carriage carrying the tools is slidably journalled onthese ways. The tools on the carriage are arranged with the threadcutting dies on the side nearest the chuck, the reamer in the center andthe pipe cutter tool at the other end. The pipe cutter is mounted so asto be fully floating so that it will adjust itself to any out-'of-roundor bent formation of the pipe or other workpiece to be cut.

The cutting oil for this machine is brought from an oil pump throughpassages in the ways to an outlet. The carriage is formed to catch theoil from the outlet and conduct it through passages in the carriage anda valve therein to a flexible tube which is always carried with thecarriage and is therefore much more convenient than prior devices wherethe oil spout was fixed to the frame.

More specifically, and with reference to the drawings, the inventionconsists of a machine having a bed or base 11 supported by legs 12. Apower drive is mounted on one end of the base 11 and comprising ahousing 13 enclosing a motor 9 and oil pump 10. The motor drives boththe chuck 16 and the pump through an arrangement of gears 14 within thehousing. A work holder or guide 15 connected to the end of a hollowshaft 15:: opposite to the chuck 16 extends from the other end of thehousing.

Extending from the housing toward the end of the base 11 opposite thehousing are a pair of bars 18 which serve as supports or ways for thecarriage 19. The carriage is composed of two members 20 and 21 extendinglongitudinally of the bars 18 and joined by a transverse member 22. Thetransverse member is formed with a pair of holes 23 to receive posts ona pipe threading device (not shown) and to hold the threader loosely inplace. A sliding pin having a knurled head 25 is provided to hold thethreader in place in a manner well known in the art. The holes 23 extendfrom the surface nearest the chuck 16.

Spaced somewhat further from the chuck 16 is a pipe reamer 27. Thisreamer is journalled on a pin 28 extending through an ear 29 on thetransverse member 22. A handle 30 on the reamer extends beyond thecutter portion 31 and provides means to lift the reamer out of the wayand lay it over the back of the carriage. In its lowered position an arm32 of the reamer rests on a boss 33 on the transverse member and issupported against motion longitudinally of the ways by an ear 34 Thethird tool required in a normal operation is a cutter. In the currentmachine, the cutter 35 is journalled on a turned down boss 36 on therear longitudinal member 21. The mounting for this tool is novel in thatit allows free movement of the device in two directions. A journal ormounting member 37 is journalled on the boss 36 and holds a pin or setscrew 38 extending into a slot 38a in the boss out only partially aroundthe boss 36 and restricts its rotating motion.

The member 37 is formed with a rectangular arm 40' extendingtransversely of the bar 18 in an upward direction from a locationsomewhat beneath the bar (FIG. 4). A roller support member 41 is formedwith a rectangular opening 42 which is a smooth sliding fit with the armpipe threading 40. Thus the roller member 41 is free to slide on the arm40 or to pivot about the boss 36 thus having complete freedom of motionin one plane The customary type of pipe cutting mechanism is built up onthe roller member 41. A pair of rollers 42:: are journalled on themember 41, and a cutter wheel 43 is journalled in a housing 44 which isslidably mounted on rods 45 extending from the member 41. A screw 46journalled rotatably in end member 47 fixed to the ends of the rods 45,forces the cutter housing 44 towards the rollers 42 and cuts the pipe ina manner well known in the art. A handle 48 is fixed on the screw 46 toprovide the operator a ready means for turning the screw. The cutteralso may rest on a boss 49 against an ear 49' on the front slidingmember 20.

It is apparent that the cutter is free to follow any movement whichtheend of the pipe may make in a plane perpendicular to the axis of thepipe. Thus, any out-of-r-ound condition or slightly bent ends can beaccommodated without fear of damage'to the cutter device. It is alsoapparent that the pipe reamer 27 could be similarly mounted for the samereason although this usually is not necessary.

The means for moving the carriage of thisembodiment of our inventiontakes the form "of a rack and pinion arrangement (FIGS. 6 and 7). Therack 50 is formed on the front longitudinal member 20' with its teethextending downwardly. The pinion 51 is mounted on a shaft 52 journalledin the base 1 1. A hand wheel 53 on the shaft provides the means to turnthe pinion.

On the front of the base 11 directly beneath the front bar 18 is mounteda square or other fiat sided member 55. An indexing tab 56 is slidablydisposed on this member. The tab 56 has a collar 57 wrapped around themember 55 so as to engage the fiat sides to prevent turning, and ispressed tightly enough to be smoothly manually adjustable and to holdits adjustment resiliently. The tab extends outwardly and upwardly fromthe collar 57 and terminates adjacent the front longitudinal carr-iagemember 20 where it may be grasped conveniently by the operator of themachine. 7

A scale 60 is marked or fixed on the front of the member 20in the regionadjacent the extension of the tab 56. This scale may be graduated in anyconvenient units, but the left hand end is'preferab ly marked with thegage lengths of threads for the various sizes of pipes. If the rest ofthe divisions are inches and fractions thereof, the one inch line mayalso be conveniently inserted since it falls between the'gage length forl to 1 inchpipe, and that for 1% and 2 inch pipe. A pair of bosses 61extending downwardly is formed on the carriage member 20 just beyond thescale 60 in-position to engage the tab 56 to assure that the tab isalways in convenient position.

It is apparent that the above described scale will be useful inthreading pipe. The tab 56 can be slid along the member 55 until ittouches the left hand boss 61 at the position where the threading diesbegin to take their first cut. At this point, the index line in the tabis directly aligned with the zero line on the scale. As the carriage isthen moved to the left in the threading operation, the operator canwatch the scale and determine directly therefrom when to stop themachine or to release the cutting dies'from the pipe. This scale mayalso be useful in cutting nipples of a certain length or in cutting froma piece of pipe, an end of a certain length'to retain the desired lengthof pipe inthe chuck '16.

In order to provide cutting oil to the work piece being operated on, anoil system isprovided. The oil pump '10 pumps oil'into a passage 63formed in the front supporting bar 18. The passage extends into the bar,to a point just at the center of travel of the carriage 'where it isintersected by a hole 64 leading to the surface of the bar 18. The frontcarriage member '20 is journalled on the bar 18 only at its ends, beingformed with an enlarged chamber 65 between the'ends. Movement 'of thecarriage is limited so that the hole 64 always opens into this chamber65. Thus the oil from the pump runs through the passage 63 and the hole64 into the chamber 65. Oil seals 66 may be provided at the journalledends of the carriage member 20.

Within the carriage, an oil passage 67 is formed extending from thechamber 6 5 transversely and then upward into the transverse member 22.A valve 68 (FIG. 5) preferably adapted to bypass the flow of the fluidis mounted in the transverse member 22 to control the flow of oil ontothe work. The bypass type of valve is preferred since this prevents thebuilding up of a pressure within the chamber 65 and consequently leakageof oil out of the ends.

One simple preferred type of bypass valve is shown in FIG. 5. A valvebarrel 70 is journalled in a boss 71 formed in the transverse member 22,and in line with the passage 67. The barrel is held in place by acompression spring 72 engaged between a washer 73 held on the barrel bya pin 74 and a counterbored surface 75 on the member 22. A transverseslot 76 adapted to be aligned with the passage 67 is formed in thebarrel to allow straight through flow. Bypass flow is provided by alongitudinal slot 7 8 adapted to connect the lower part of the passage67 with a bypass outlet 79. A handle 80 is provided on the barrel toturn it.

From the valve 68 the oil normally flows'upward into a flexibleadjustable tube 82 terminating in a nozzle 83. This tube is just longenough to allow the nozzle to be positioned at any of the pipe workingtools on this car riage. Since it is mounted on the carriage, the tubeneed not be long but is conveniently short and requires a mimmum amountof adjusting in contrast to prior devices where the oil lines were fixedto the frame.

The oil return to the pump 16 is through a screen 84 to a sump formed inthe base 11 which catches the oil and them which the pump draws the oilto pump it again through the system.

Inuse, a pipe is inserted in the chuck 16 extending far enough to passthrough the threader in which the chasers are withdrawn, pastthe reamer27 which is raised out of the way, and into the cutter 35 when thecarriage is moved to its position furthest tothe left (FIG. 1). Thechuck is tightened and the motor started, for rotation in eitherdirection for cutting the pipe by a switch at 85. The

cutter wheel 43 is pressed into the pipe in a manner well known in theart and the pipe is cut. Because of the free mounting of the cutter, nospecial care need 'be taken to be sure that the pipe is straight orround or properly centered.

The carriage is then moved slightly to the right so that the cut end ofthe-pipe is directly in the line of the reamer 27. The pipe is thenrotated so that the upper surface is moving away from the operator.which would unscrew a normal pipe from the chasers if they were engaged.With the pipe rotating in this direction, the reamer 2.7 is pressed downon the upper edge of the pipe. The reamer blades will then cut a slightchamfer on the end, making an easy start into the chasers possible.

After this operation, the motor is reversed by the reversing switch 85,the carriage moved to the right, the chasers closed and the indexing tab56 set. Before each cutting operation, the nozzle 83 of the oil systemmay be adjusted slightly to each of the separate tools. However, sinceit is carried by'the' carriage, the adjustment is slight and none of thetools is drenched with oil by the change of position of the carriage.Because of the reversal of the motor in these operations, and theconsequent reversal of direction of rotation of the oil pump, it isnecessary to have some sort of reversible pump such as that disclosed inthe Anton J. I anik Patent No. 2,716,947, of September 6, 1955.

The threads are cut in a manner well known in the art,

This is the direction a -the machine running until the proper gage lineon the scale is reached. An additional signal to the operator isprovided for by the open construction of the carriage. It is, therefore,possible to see the chasers easily, and if the chasers are constructedso that the full gage length of threads is cut as the end of the pipereaches the end of the chasers, it is readily visible as a signal to theoperator that the pipe is properly threaded. At the time when this pointis reached, the chasers are released, thus stopping the thread cuttingoperation.

The pipe is then reamed by inserting the reamer into the opening andmoving the carriage so that the reamer operates to cut the burrs off theinside of the pipe. The threading operation is complete at this point,but if the piece is to be a nipple, the carriage could be moved one morestep and the pipe cut 01f.

Thus, it is apparent that a single cycle of motion from right to leftand back again completes all the operations customarily performed onthis type of machine. In addition, the various sub-combinations are moreefiicient in their individual operations than previous devices.

A second embodiment similar to that just described is illustrated inFIG. 8. In this embodiment, the framework and power unit are exactly thesame as that previously described. The carriage is somewhat different,however, as are the tools carried thereby. The carriage is stillcomposed of a front member 20 and a rear member 21' similar in mostrespects to the members 20 and 21 of the original carriage. The oildistributing system is also the same in the two machines.

In this second embodiment, however, the tools are arranged somewhatdifferently. The pipe cutter 90 is mounted in a manner the same aspreviously at the end of the carriage member 21 nearest the chuck 16. Asillustrated, the cutter is made in a form well known in the art having aC-shaped frame 96 in which the rollers 42 are journalled and on whichthe housing 44' is slidably moved by the adjusting screw under thecontrol of the handle 48. It will readily be seen that the shape of theframe and housing is not important to the novel mounting of this tool aspreviously described.

The threader 98 is of a type well known in art but is mounteddifferently from the usual threader in a power machine by being pivotedat one side in a boss 99 formed on the cross member 22. The other sideis provided with a tongue 101 adapted to fit into a fork 102 on thefront member 20' which provides support for the threader. It is apparentthat the threader can easily be pivoted out of the path of a pipe heldin the chuck 16 if desired.

A novel reamer 105 is mounted at the end of the carriage furthest fromthe chuck. -An arm 106 of the reamer body member 107 is pivoted on a pinin a fork 108 on the transverse member 22. The handle 109 is adapted toabut an upstanding lug or ear 110 formed at the other end of the member22' when the reamer is in its lowered position.

As is best shown in FIGS. 9-14, the reamer is mounted in the body member107 on a shaft 112 which carries a knob 113 at one end and the reamingtool 114 at the other end. This shaft is slidably journalled in a holein the housing and is kept from rotation at any but the fully extendedor retracted position solely by the engagement of any one of a pair ofpins 115 in the shaft with a keyway 116 in the housing. Movement of theshatt longitudinally is limited by the knob 113 and tool 114. Themovement is sufiicient, however, so that with the tools mounted on thecarriage as shown in FIG. 8, the reamer tool 114 may be extendedsufficiently to ream a pipe previously cut by the cutter 90 with littleor no movement of the carriage.

In order to hold the reamer in that position and to prevent turning ofthe tool, the knob 113 is formed with a neck part 118 through which apin 119 extends and secures the knob to the shaft. The neck is formedwith one pair of diametrically opposite parallel flat surfaces 6 120extending from the end of the neck nearly to the knob. A second pair ofparallel flat surfaces 121 is pro vided at an angle from the first pair.This second pair does not extend to the end of the neck 118, but insteadleaves a pair of opposite abutment members 122 somewhat in the form of:a truncated collar.

The body 107 at the end adjacent the knob 113 is also specially formedto co-act with the knob member. An opening 124 is formed at that endhaving a shape complementary to the neck end of the knob, i.e., theopening is in the shape of a circle cut by parallel chords. Thisprovides two flat surfaces 125 which may be slightly relieved as at 126for the passage of the pins 115. Deeper the body, the opening is cutaway to a full circular opening 128. This leaves a pair of segmentalstop pieces 129 in the opening 123.

As is best shown in FIG. 14, the knob may be inserted into the opening123 and, upon complete insertion, turned through the angle between thetwo pairs of parallel surfaces 120 and 121. The abutment member 122 willthen be caught behind the stop pieces 129 to prevent longitudinalmovement while rotation is prevented by the engagement of the surface121 with the surface 125 of the stop piece 129. The pins 115 are locatedso that in this position of the tool, they are completely out of thekeyway 116. When the knob 113 is turned to be retracted, the pins 115will again be aligned with the keyway so that the shaft may be slid tothe retracted position.

Rotation of the reamer in the restricted position is prevented by meanssimilar to those just described. The tool 114 is provided with a shank132 which is formed with a pair of parallel flat sides 133. These sidesengage the fiat Walls 135 of an opening 134 complementary to the shank132 formed in the body 107. Since longitudinal force is primarily to theleft (FIGS. 9, 13 and 14) no abutment members or the like are necessary.However, to prevent inadvertent longitudinal motion, a spring loadedbal-l detent arrangement 136 is provided pressing the ball into acircumferential groove-137 in the shaft. Thus, the reamer is usable ineither of the two positions.

This type of reamer is particularly useful in this second embodiment ofthe machine as will be apparent from the following description of theoperation of the machine. Before the threading of the pipe is started,the tools are all in a tilted back position. The pipe is then insertedthrough the chuck until the cutter is approximately at the desired pointof 1cut-off of the pipe. The cutter may then be lowered over the pipebecause of the C-shaped frame, and the exact position be adjusted by thecarriage. After cutting the pipe, the cutter is raised, and the threadermay be dropped, and the carriage moved the required distance to threadthe pipe. However, if it is desired to ream the pipe before threadingit, the reamer may be dropped, and one tool moved to its extendedposition and the pipe reamed first, and then threaded. The reamer ispreferably tilted back for the threading. When the threading operationis complete, the dies in the threader are preferably relased by anymeans well known in the art, and the reamer may then be dropped intoposition and the pipe reamed with the reamer in the retracted position.Thus, it will be apparent that very little shifting of the carriage isnecessary for a complete cycle of cutting, threading and reaming thepipe.

Having thus described our invention, we are aware that numerous andextensive departures may be made therefrom Without departing from thespirit or scope of our invention.

We claim:

1. In a power driven pipe tool having means for rotating a pipe forperforming a cutting off operation thereon in the presence of orbitalmovement of the pipe including a support means, a tool carrier slidablydisposed on support means, a pipe cutter mounted for orbitall movementin a plane transverse to the rotating means on said carrier comprising ajournal member rotatably mounted on said carrier for free rotation in anlanetransverse to the pipe rotating means, means to restrict the t0-tary movement of said journal member in both directions on said carriercomprising cooperating means between the journal member and the carrierand a pipe cutting tool freely slridably disposed on said journal memberfor movement toward and away from said pivotal member. 5

2. A deviceas described in claim 1, wherein said cooperating meanscomprises a slot formed in the Wall of the carrier to define spaced endWalls and means carried by the journal member arranged to engage with anendtwall of the slot.

Referenees fited in the file'of this patent UNITED STATES PATENTSLilleberg June 26, Pealer Sept. 29, Pealer May 4, Vesper June 16, PealerJan. 3,

1. IN A POWER DRIVEN PIPE TOOL HAVING MEANS FOR ROTATING A PIPE FORPERFORMING A CUTTING OFF OPERATION THEREON IN THE PRESENCE OF ORBITALMOVEMENT OF THE PIPE INCLUDING A SUPPORT MEANS, A TOOL CARRIER SLIDABLYDISPOSED ON SUPPORT MEANS, A PIPE CUTTER MOUNTED FOR ORBITAL MOVEMENT INA PLANE TRANSVERSE TO THE ROTATING MEANS ON SAID CARRIER COMPRISING AJOURNAL MEMBER ROTATABLY MOUNTED ON SAID CARRIER FOR FREE ROTATION IN APLANE TRANSVERSE TO THE PIPE ROTATING MEANS, MEANS TO RESTRICT THEROTARY MOVEMENT OF SAID JOURNAL MEMBER IN BOTH DIRECTIONS ON SAIDCARRIER COMPRISING COOPERATING MEANS BETWEEN THE JOURNAL MEMBER AND THECARRIER AND A PIPE CUTTING TOOL FREELY SLIDABLY DISPOSED ON SAID JOURNALMEMBER FOR MOVEMENT TOWARD AND AWAY FROM SAID PIVOTAL MEMBER.